If you have your VSCode with the right extensions, and if you have Docker and Docker-compose installed in your system, when you open the Project's main folder you'll see a window on the bottom right corner, click in "reopen in container" button, if you don't see anything press Ctrl+Shift+P and type Remote-Containers: Rebuild and Reopen in container or Docker-images: Build Image option. When the container is opened, and executed for the first time or when there are changes on it, you can go for a walk because the building image process will start and it'll take a while due to the installation of all packages and dependencies of the dev-environment as OpenCV, Python, and more stuff related to, while the process is completed here are some videos of puppies. You can see at any time the logs of the building process clicking in Starting with Dev Container on the bottom right corner. When the process is done you'll see some messages of process succeed.
When the process is done you can open a terminal in the dev-container going to the menu bar Terminal and then New Terminal. Congratulations now you have everything that I use for the deployments and development of this project.
Do not forget pull the repo's sub-modules (if there are) with:
git submodule update --init